package com.sky.aspect;


import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.stereotype.Component;
import org.aspectj.lang.reflect.MethodSignature;

import java.time.LocalDateTime;

@Aspect
@Component
@Slf4j
public class AutoFillAspect {

    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointCut( ) {

    }

    @Before("autoFillPointCut()")
    public void AutoFill(JoinPoint joinPoint ) {
        log.info("开始进行公共字段填充---");
        //获得到当前被拦截方法上数据库操作类型
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();//方法签名对象
        AutoFill autoFill = signature.getMethod().getAnnotation(AutoFill.class);//获得方法上的注解对象
        OperationType operationType = autoFill.value();//获得数据库操作类型


        //获取到当前被拦截的方法参数--实体对象

        Object[] args = joinPoint.getArgs();
        if (args == null || args.length == 0) {
            return;
        }
        Object entry = args[0];



        //准备赋值的数据

        LocalDateTime now = LocalDateTime.now();
        Long currentId = BaseContext.getCurrentId();



        //根据当前不同的操作类型，为对应的属性通过反射来赋值

        if (operationType == OperationType.INSERT) {

            try {
                entry.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class).invoke(entry, now);
                entry.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class).invoke(entry, currentId);
                entry.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class).invoke(entry, now);
                entry.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class).invoke(entry, currentId);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        if (operationType == OperationType.UPDATE) {
            try {
                entry.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class).invoke(entry, now);
                entry.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class).invoke(entry, currentId);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

    }

}
